/*
 * Copyright 2017-2020 original authors
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package io.micronaut.docs.writable

//tag::imports[]
import groovy.text.SimpleTemplateEngine
import groovy.text.Template
import io.micronaut.core.io.Writable
import io.micronaut.http.MediaType
import io.micronaut.http.annotation.Controller
import io.micronaut.http.annotation.Get
import io.micronaut.http.server.exceptions.HttpServerException
//end::imports[]

//tag::clazz[]
@Controller("/template")
class TemplateController {

    private final SimpleTemplateEngine templateEngine = new SimpleTemplateEngine()
    private final Template template = initTemplate() // <1>

    @Get(value = "/welcome", produces = MediaType.TEXT_PLAIN)
    Writable render() { // <2>
        { writer ->
            template.make( // <3>
                    firstName: "Fred",
                    lastName: "Flintstone"
            ).writeTo(writer)
        }
    }

    private Template initTemplate() {
        try {
            return templateEngine.createTemplate(
                    'Dear $firstName $lastName. Nice to meet you.'
            )
        } catch (Exception e) {
            throw new HttpServerException("Cannot create template")
        }
    }
}
//end::clazz[]
